Intel MB896 user manual Interrupt Request Lines IRQ, Level Function

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APPENDIX

B. Interrupt Request Lines (IRQ)

Peripheral devices use interrupt request lines to notify CPU for the service required. The following table shows the IRQ used by the devices on board.

Level	Function
IRQ0	System Timer Output
IRQ1	Keyboard
IRQ2	Interrupt Cascade
IRQ3	Serial Port #2
IRQ4	Serial Port #1
IRQ5	Reserved
IRQ6	Floppy Disk Controller
IRQ7	Parallel Port #1
IRQ8	Real Time Clock
IRQ9	Reserved
IRQ10	Reserved
IRQ11	Reserved
IRQ12	PS/2 Mouse
IRQ13	80287
IRQ14	Primary IDE
IRQ15	Secondary IDE

58	MB896 User’s Manual

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Contents USER’S Manual VersionAcknowledgments Table of Contents MB896 Mini ITX Motherboard Introduction Product DescriptionChecklist MB896 Specifications CPU FSBIntroduction Board Dimensions Installations Installing the CPU Installing the Memory Installing and Removing Memory ModulesSetting the Jumpers Jumper Locations on MB896 JP2 Pentium M Vcc Voltage Selection JP3 LCD Panel Power SelectionJP4 Clear Cmos Setting JP5 CompactFlash Slave/Master SelectionConnectors on MB896 Connector Locations on MB896 CN1 PS/2 Keyboard and PS/2 Mouse Connectors CN2 COM1 and VGA ConnectorFAN2 CPU Fan Power Connector IDE1 IDE Connector FDD1 Floppy Drive ConnectorJ1 IrDA Connector J11 ATX12V ConnectorATX1 ATX Power Supply Connector J3 System Function Connector J2 Digital I/OATX Power on Switch Pins 7 J6 USB5/6 Port Pin HeaderJ7 COM2 Serial Port J9 LCD Backlight SettingJ14 Mini PCI Connector J17 Wake On LAN Connector J15 Speaker ConnectorJ16 1394 Connector J18 Front Audio ConnectorJ20 CD-In Pin Header SDVOCCLK+This page is intentionally left blank Bios Setup Bios Introduction Bios SetupPhoenix AwardBIOS Cmos Setup Utility Standard Cmos Setup DateDrive a / Drive B TimeIDE Channel Master/Slave Video Halt OnHard Disk Boot Priority Advanced Bios FeaturesCPU Feature Virus WarningBoot Other Device Quick Power On Self TestFirst/Second/Third Boot Device Boot Up Floppy SeekSecurity Option Typematic Delay MsecApic Mode MPS Version Control for OSDram Timing Selectable Advanced Chipset FeaturesDram RAS# to CAS# Delay CAS Latency TimeVideo Bios Cacheable Precharge Delay tRASSystem Bios Cacheable On-Chip VGA SettingOnboard PCI-E LAN Panel ScalingPanel Number LAN PXE Option ROMIntegrated Peripherals OnChip IDE DeviceOn-chip Primary PCI IDE Enabled IDE HDD Block ModeIDE DMA Transfer Access OnChip Primary/Secondary PCI IDEKB Power on Password On-Chip Serial ATA SettingPower on Function Hot Key Power onPwron After PWR-Fail Uart Mode SelectOnboard Serial Port Power Management Power Management SetupRUN Vgabios if S3 Resume Acpi FunctionPower On by Ring Suspend ModeHDD Power Down Video Off MethodResume by Alarm Reload Global Timer EventsPNP/PCI Configurations Bios Setup PC Health Status Spread Spectrum Modulated Frequency/Voltage ControlAuto Detect PCI Clk Set Supervisor Password Load Fail-Safe DefaultsLoad Optimized Defaults Save & Exit SetupThis page is intentionally left blank Drivers Installation Intel Chipset Software Installation Utility Click IntelR Chipset Software Installation UtilityDrivers Installation VGA Drivers Installation Click IntelR 915GMChipset Family Graphics DriverImportant Note AC97 Codec Audio Driver Installation Click Realtek AC97 Codec Audio DriverLAN Drivers Installation Click Install Base Software to continueDriver Installation Appendix O Port Address MapInterrupt Request Lines IRQ Level FunctionWatchdog Timer Configuration Sample CodeAppendix W627EHFBASE = 0x4E result = W627EHFBASE OutportbW627EHFINDEXPORT, W627EHFLOCK Appendix W627EHFLOCK